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   &#160;<span id="projectnumber">4.4.0</span>
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<div class="header">
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<a href="#func-members">Functions</a>  </div>
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<div class="title">ctype.h File Reference</div>  </div>
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<div class="textblock"><code>#include &lt;<a class="el" href="types_8h_source.html">types.h</a>&gt;</code><br />
<code>#include &lt;<a class="el" href="stdbool_8h_source.html">stdbool.h</a>&gt;</code><br />
</div>
<p><a href="ctype_8h_source.html">Go to the source code of this file.</a></p>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:aa08b907b413d5f156b6214e72d0612bb"><td class="memItemLeft" align="right" valign="top"><a class="el" href="stdbool_8h.html#abb452686968e48b67397da5f97445f5b">bool</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ctype_8h.html#aa08b907b413d5f156b6214e72d0612bb">isalpha</a> (char <a class="el" href="sms_8h.html#a0b3366755f3276b0243c1e0497471b7a">c</a>)</td></tr>
<tr class="separator:aa08b907b413d5f156b6214e72d0612bb"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a31e9b95a4c8bca65d901dca5c0c95c1f"><td class="memItemLeft" align="right" valign="top"><a class="el" href="stdbool_8h.html#abb452686968e48b67397da5f97445f5b">bool</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ctype_8h.html#a31e9b95a4c8bca65d901dca5c0c95c1f">isupper</a> (char <a class="el" href="sms_8h.html#a0b3366755f3276b0243c1e0497471b7a">c</a>)</td></tr>
<tr class="separator:a31e9b95a4c8bca65d901dca5c0c95c1f"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a0b70d87c74367a00d03702a44da39614"><td class="memItemLeft" align="right" valign="top"><a class="el" href="stdbool_8h.html#abb452686968e48b67397da5f97445f5b">bool</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ctype_8h.html#a0b70d87c74367a00d03702a44da39614">islower</a> (char <a class="el" href="sms_8h.html#a0b3366755f3276b0243c1e0497471b7a">c</a>)</td></tr>
<tr class="separator:a0b70d87c74367a00d03702a44da39614"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af3380cc4b95d21a135cd1b35fc9a09cc"><td class="memItemLeft" align="right" valign="top"><a class="el" href="stdbool_8h.html#abb452686968e48b67397da5f97445f5b">bool</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ctype_8h.html#af3380cc4b95d21a135cd1b35fc9a09cc">isdigit</a> (char <a class="el" href="sms_8h.html#a0b3366755f3276b0243c1e0497471b7a">c</a>)</td></tr>
<tr class="separator:af3380cc4b95d21a135cd1b35fc9a09cc"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a48644b2a9c138472af0e1c83f688bd58"><td class="memItemLeft" align="right" valign="top"><a class="el" href="stdbool_8h.html#abb452686968e48b67397da5f97445f5b">bool</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ctype_8h.html#a48644b2a9c138472af0e1c83f688bd58">isspace</a> (char <a class="el" href="sms_8h.html#a0b3366755f3276b0243c1e0497471b7a">c</a>)</td></tr>
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<tr class="memitem:a811b7a0d5194feaccfacf8a7f02bb9c3"><td class="memItemLeft" align="right" valign="top">char&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ctype_8h.html#a811b7a0d5194feaccfacf8a7f02bb9c3">toupper</a> (char <a class="el" href="sms_8h.html#a0b3366755f3276b0243c1e0497471b7a">c</a>)</td></tr>
<tr class="separator:a811b7a0d5194feaccfacf8a7f02bb9c3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a207391fc2c5fa7786d5e0b9ef8ba5e80"><td class="memItemLeft" align="right" valign="top">char&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ctype_8h.html#a207391fc2c5fa7786d5e0b9ef8ba5e80">tolower</a> (char <a class="el" href="sms_8h.html#a0b3366755f3276b0243c1e0497471b7a">c</a>)</td></tr>
<tr class="separator:a207391fc2c5fa7786d5e0b9ef8ba5e80"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Character type functions. </p>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="aa08b907b413d5f156b6214e72d0612bb"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa08b907b413d5f156b6214e72d0612bb">&#9670;&nbsp;</a></span>isalpha()</h2>

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          <td class="memname"><a class="el" href="stdbool_8h.html#abb452686968e48b67397da5f97445f5b">bool</a> isalpha </td>
          <td>(</td>
          <td class="paramtype">char&#160;</td>
          <td class="paramname"><em>c</em></td><td>)</td>
          <td></td>
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<p>Returns TRUE if the character <b>c</b> is a letter (a-z, A-Z), otherwise FALSE </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">c</td><td>Character to test </td></tr>
  </table>
  </dd>
</dl>

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</div>
<a id="a31e9b95a4c8bca65d901dca5c0c95c1f"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a31e9b95a4c8bca65d901dca5c0c95c1f">&#9670;&nbsp;</a></span>isupper()</h2>

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          <td class="memname"><a class="el" href="stdbool_8h.html#abb452686968e48b67397da5f97445f5b">bool</a> isupper </td>
          <td>(</td>
          <td class="paramtype">char&#160;</td>
          <td class="paramname"><em>c</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">
<p>Returns TRUE if the character <b>c</b> is an uppercase letter (A-Z), otherwise FALSE </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">c</td><td>Character to test </td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="a0b70d87c74367a00d03702a44da39614"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a0b70d87c74367a00d03702a44da39614">&#9670;&nbsp;</a></span>islower()</h2>

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          <td class="memname"><a class="el" href="stdbool_8h.html#abb452686968e48b67397da5f97445f5b">bool</a> islower </td>
          <td>(</td>
          <td class="paramtype">char&#160;</td>
          <td class="paramname"><em>c</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">
<p>Returns TRUE if the character <b>c</b> is a lowercase letter (a-z), otherwise FALSE </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">c</td><td>Character to test </td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="af3380cc4b95d21a135cd1b35fc9a09cc"></a>
<h2 class="memtitle"><span class="permalink"><a href="#af3380cc4b95d21a135cd1b35fc9a09cc">&#9670;&nbsp;</a></span>isdigit()</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname"><a class="el" href="stdbool_8h.html#abb452686968e48b67397da5f97445f5b">bool</a> isdigit </td>
          <td>(</td>
          <td class="paramtype">char&#160;</td>
          <td class="paramname"><em>c</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">
<p>Returns TRUE if the character <b>c</b> is a digit (0-9), otherwise FALSE </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">c</td><td>Character to test </td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="a48644b2a9c138472af0e1c83f688bd58"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a48644b2a9c138472af0e1c83f688bd58">&#9670;&nbsp;</a></span>isspace()</h2>

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        <tr>
          <td class="memname"><a class="el" href="stdbool_8h.html#abb452686968e48b67397da5f97445f5b">bool</a> isspace </td>
          <td>(</td>
          <td class="paramtype">char&#160;</td>
          <td class="paramname"><em>c</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">
<p>Returns TRUE if the character <b>c</b> is a space (' '), tab (\t), or newline (\n) character, otherwise FALSE </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">c</td><td>Character to test </td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="a811b7a0d5194feaccfacf8a7f02bb9c3"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a811b7a0d5194feaccfacf8a7f02bb9c3">&#9670;&nbsp;</a></span>toupper()</h2>

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      <table class="memname">
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          <td class="memname">char toupper </td>
          <td>(</td>
          <td class="paramtype">char&#160;</td>
          <td class="paramname"><em>c</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">
<p>Returns uppercase version of character <b>c</b> if it is a letter (a-z), otherwise it returns the input value unchanged. </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">c</td><td>Character to test </td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a id="a207391fc2c5fa7786d5e0b9ef8ba5e80"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a207391fc2c5fa7786d5e0b9ef8ba5e80">&#9670;&nbsp;</a></span>tolower()</h2>

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          <td class="memname">char tolower </td>
          <td>(</td>
          <td class="paramtype">char&#160;</td>
          <td class="paramname"><em>c</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">
<p>Returns lowercase version of character <b>c</b> if it is a letter (A-Z), otherwise it returns the input value unchanged. </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">c</td><td>Character to test </td></tr>
  </table>
  </dd>
</dl>

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